diff --git a/functions/defaults.sh b/functions/defaults.sh
index a23424f..91350ab 100755
--- a/functions/defaults.sh
+++ b/functions/defaults.sh
@@ -485,7 +485,7 @@
 	for FLAVOUR in ${LB_LINUX_FLAVOURS_WITH_ARCH}
 	do
 		ARCH_FILTERED_FLAVOUR="$(echo ${FLAVOUR} | awk -F':' '{print $1}')"
-		LB_LINUX_FLAVOURS="${LB_LINUX_FLAVOURS} ${ARCH_FILTERED_FLAVOUR}"
+		LB_LINUX_FLAVOURS="${LB_LINUX_FLAVOURS:+$LB_LINUX_FLAVOURS }${ARCH_FILTERED_FLAVOUR}"
 	done